Vaccine inequities become "more grotesque everyday," World Health Organization Director-General Tedros Ghebreyesus said at a recent press conference. Yet, it's already happening. "The first wave is American expats living abroad who are coming back to the U.S. for their shots," said David Levine, an author and consultant on travel and tourism trends. "Some are staying for weeks to get the second shot, some are returning to the U.S. twice." "Vaccine tourism is most definitely a trend and I believe the trend will continue," said Rose Gray, of the Wisconsin-based Fox World Travel. "States and even counties determine their own distribution system for the COVID-19 vaccines. We are seeing wealthy Mexican citizens who have dual citizenship or family ties to the United States crossing the border to get vaccinated."